Frank



(No Model.)

P. M. SPAULDING.

y PHOTOGRAPH'IG SHUTTER. No. 462,335. Patented Nov.3,1891.

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UNITED STATES PATENT OFFICE.

FRANK. M. SPAULDING, OF KALAMAZOO, MICHIGAN, ASSIGNOR TO TIIF. E. & H.T. ANTHONY du COMPANY, OF NEV YORK, N. Y.

PHOTOGRAPHIC SH UTTER.

SPECIFICATION forming part of Letters Patent No. 462,335, dated November3, 1891.

Application filed October l1, 1890. Serial No. 367,883. (No model.)

To @ZZ whom it may concern:

Be it known that I, FRANK. M. SPAULDING, of the city of Kalamazoo,county of Kalamazoo, and State of Michigan, have made and invented a newand useful Improved Photographic Shutter, of which the following is afull, clear, and exact description, reference being had to the drawingsforming part of this application.

My .invention consists in a new and improved construction of the partscomposing the apparatus and their combination and coaction in suchmanner that I am enabled to make an instantaneous exposure or a timeexposure, and also my apparatus is so constructed that the shutter-Wingsare reset or may be reset for a second exposure immediately after aninstantaneous exposure by simply squeezing the bulb which actuates theengine once, the single action of the engine serving both to make theinstantaneous exposure and to effect the resetting of the shutter forthe second exposure.

Figure l illustrates an elevation of the front of my shutter. Fig. 2illustrates an elevation of the interior mechanism within theshuttercase. Fig. 3 illustrates an edge view of the shutter-case inelevation. Fig. 4 illustrates a sectional View on the line 2 2 of Fig.2.

A is the shutter-case. It is shown as round in the drawings; but it maybe of any other preferred shape, and it may be made of any preferredmaterial.

B B are the shutter-wings.

O O are two guides, which may be made of wire, as shown in the drawings,or may be made in any other form or of any other material, so that theyguide the shutter-wings in a lateral direction, thus separating themduring the action of the engine.

D is a bell-crank lever, pivoted at c to the case of the shutter.

E is a pneumatic engine, which may be ofnot necessarily, curved, asshown in Fig. 3.

It has a hole fr at its forward end, through which projects a pin t',which is attached to one end of the bell-crank lever D. The other end ofthe bell-crank lever is attached by a pivot a to the lower ends of theshutter-wings B.

m is a string which is fastened at one end to the shutter-case and atits other end is attached to the bell-crank lever D in such mannerasnormally to retract that lever, placing the shutter-wings in theirclosed position.

t z5 are two clips, one of which is attached at or near the upper end ofeach of the shutter-wings'B, and they engage with the guides O, as bestseen in Fig. 4, in such manner that they can easily slide upon theseguidewires, and thus guide and control the movements of theshutter-Wings during the action of the engine, separating them as theexposure is made.

P is a lever pivoted to the outside of the front plate of theshutter-case, as at at, having at one end a knob or hand-grasp, asshown, and at the other end an inclined surface vu.

The operation of the device is as follows: Then it is desired to make atime exposure, the lever P is turned away from the slot F,

as shown in dotted lines in Fig. l, up through which slot the pin 't'extends to engage with the piston-rod. rlhe bulb is then squeezed, andthe consequent action of the engine through the piston-rod f, pin c',bell-crank le- VervD, and pivot a draws the shutter-wings B B away fromthe exposure-aperture, during which movement the wings are likewiseguided in a lateral direction by the clips t, engaging' with the guidesO, until the parts assume the position shown in dotted lines, Fig. 2,and they will remain in that position as long as pressure is maintainedupon the bulb. 'lo make an instantaneous exposure the lever P is swunginto the position shown in full lines in Figs. l and 3. Upon nowsqueezing the bulb the engine will move outwardly, drawing theshutter-wings away from the exposureaperture, as above described,'thusmaking the exposure; but when the piston-rod f has nearly reached itsextreme outward position its upwardly-curved extremity tl slides up uponthe inclined surface fu, whereby the spring pistonrod is lifted from offthe pin t', and as soon as its hold upon the pin i is released then thespring m instantly returns the bell-crank lever D and the wings B totheir normal closed position,

IOO

the pin t' then ot' course returning to the .other end of the slot F.Now, upon relieving the bulb of pressure the piston N and the piston-rodf are withdrawn again, and the piston-rod rides up upon the pin i untilit is a second time coincident with the slot i near the end of thepiston-rod. It then immediately enters the slot o, and the parts are ina position for a second exposure.

Having' described my invention, I claiml. The combination,in aphotographic shutter, of a plurality of shutter-wings connected with thesame motor at one end and guides with which the shutter-wings areconnected at or near their otherends and by v. hich they are given amovement away from each other when the motor is operated, substantiallyas set forth.

2. The combinatiominaphotographic shutter, of a plurality ofshutter-wings connected with the motor at one end and guides with whichthe shutter-wings are connected at or near thcirother ends, by whichthey are given a movementl away from each other when the motor isoperated, and means, substantially as described, whereby the hold of themotor upon thewings may be broken, for the purpose set forth.

3. The combination, in a photographic shutter, of a plurality ofshutter-wings connected with the same motor at one end and guides withwhich the shutter-wings are connected at or near their other ends, bywhich they are given a movement away from each other when the motor isoperated, means, substantially as set forth, whereby the hold of themotor upon the wings may be broken,and means separate and distinct fromthe motor, suoli as a spring, for returning the shutterwings to theirclosed position, for t-he purpose set forth.

4E. The combination,in a photographic shutter, of a plurality ofshutter-wings connected with the same motor at one end and guides withwhich the shutter-wings are connected at or near their other ends, andmeans, substantially as shown, such as a spring, sepa` rate and distinctfrom the motor, for returning the wings to their closed position, forthe purpose set fort-h.

5. The combination, in aphotographic sh ut.- ter, of shutter-wingsconnected at one end to a lever and at their other ends todctleclingguides, a motor connected to the lever by a flexibleconnection, and adjustable inclined surfaces adapted to engage with theflexible connection and break its hold upon the said lever,substantially as set forth.

(5. The combinatiomin a photographic shutter, of shutter-wings, a motor,and a iiexible connection or piston-rod between the moving` part of themotor and the wings, substantially as set forth.

FRANK. M. SPAULDlNG.

fitnessesz PHILLIPS ABBo'r'r, D. C. HORDEMAKER.

